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nalin [4]
2 years ago
12

Of 15 problems on a test, 13 were correct. What percent were correct?

Mathematics
1 answer:
grandymaker [24]2 years ago
8 0
Use long division to divide 13/15.
This will give you 0.8666... (repeating)
Multiply by 100 to get your percent.
\boxed{86.\overline6\%}
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6 times a number is 27 less than the square of that number. Find the positive solution.
Verdich [7]

Let x = your number.

6x = x^2 - 27. Subtract 6x from each side.

0 = x^2 - 6x - 27. Factor

0 = (x-9) (x+3). Set each term equal to zero

(x+3) = 0. Subtract 3 from each side.

x = -3. This is the negative solution.

(x-9) = 0. Add 9 to each side.

x = 9. This is the positive solution.

6 0
3 years ago
What time is it 7 in a half hours before 2:12 am
scoray [572]
6.42 pm is the answer. You can think backward 8 hours before 2:12 am, which is 6:12pm. Now, go 'forward' a half an hour<span>, to 6:42pm. Answer: 6:42pm.</span>
5 0
3 years ago
What is the slope between the points (-3, 7) and (-5, 4)​
IrinaVladis [17]

Answer:

3/2

Sorry for the bad handwriting.

4 0
3 years ago
Rhian sat a maths test and an English test In the Maths test she scored 14 out of 17 In the English test she scored 31 out of 39
BabaBlast [244]

Answer:

Rhian did better in the Math test.  

Step-by-step explanation:

Given: Rhian scored 14 out of 17 in a Math test. In the English test she scored 31 out of 39.

To find: In which test did she do better?

Solution:

We have,

Rhian scored 14 out of 17 in a Math test.

Rhian scored 31 out of 39 in an English test.

So, first we need to find the percentage of the marks scored.

Percentage in the Math test =\frac{14}{17}\times100=82.35 \%.

Percentage in the English test =\frac{31}{39}\times100= 79.49\%.    

Clearly, the percentage in the Math test is greater than the percentage in the English test.

So, Rhian did better in the Math test.    

8 0
2 years ago
A line has a slope of 8 and a y-intercept of 2. What is its equation in slope-intercept form?
Bumek [7]

Answer:

y = 8x + 2

Step-by-step explanation:

Slope-intercept form: y = mx + b

m = slope

b = y-intercept value

6 0
2 years ago
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